Gas mixer



June 3 1924.

G. E. A. HALLETT GAS MIXER GAS MIXER 2 Sheets-Sheet. 3

June 3 1924.

G. E. A. HALLETT Patented June 3, 1924.

UNITED STATES GEORGE 11 a. naLLn'r'r, or narrow, omo.

GAB MIXER.

Application filed. March 28, 1921. Serial No. 458,288.

To all whom it may concern:

Be it known that I, GEORGE E. A. HAL- LETT, a citizen of the United States, residing at De ton, in the county of Mont- 6 gomery an State of Ohio, have invented certain new and useful Im rovements in Gas Mixers, of which the ollowing is a specification.

This invention relates in neral to charge 10 forming devices for interna combustion engines and more particularly to a mixing chamber wherein the fuel, as delivered from the carburetor, may be more thoroughly and intimately mixed. This invention further 16 provides for the separation of any particles of liquid fuel, which may be carried over by the rush of gases, from the mixture, with the subsequent return of such particles to such a point in the intake manifold 20 as will rovide for their revolatilization.

Consi erable difficulty has been experienced in internal combustion engines, particularly where low grade fuels are to be used, by reason of the incomplete volatiliza tion of the liquid fuel delivered by the carburetor to the engine. It is well known that in hi h speed engines particularly, raw liquid fue in large drops is drawn along the sides of the intake manifold and into so the engine with the consequent improper mixture, waste of fuel and engine inefliciency and carbonization.

Furthermore, it has been noted that in high speed en me there are violent pulsa- 36 tions in the ffiiw of the fuel mixture due to the intermittent rush of gases in the intake manifold incident to t e opening and closing of the intake valves. These pulsations are sufficiently violent at high speeds 40 to cause a certain amount of alternate carburetor flooding andengine starving. The fire risk incident to the said flooding is naturally very great and should be avoided. The unevenness of fuel feed due to the rebound of the gases upon the closing of the valve results in a temporary starving of the cylinder feed by the next inlet valve to open and results in extreme roughness in the o eration of the motor.

'It is t e purpose of my invention to pro vide a mixing chamber with a fan or other means which will insure that the fuel components shall be thoroughly and intimately mixed.

A second object of my mvention s to adapt this mixing chamber to prevent any particles of raw liquid fuel from being drawn into the en ine cylinders. By this provision a dry mixture will be insured.

A further object of my invention is to provide a means whereb the pressure at which the fuel is to be a mitted to the oylinders may be regulated.

Another object of my invention is to provide means whereby the pulsations in the intake manifold caused b the intermittent opening and closing of the valves may be damped out.

While I do-not limit the scope of my invention to the specific embodiment shown, it is believed that a full and complete disclosure of my invention may be found in the accompanying specification and drawings, in whichig. 1 is a side elevation of my device as applied to an internal combustion engine;

Fi 2 is a vertical section of the mixing chanilier and intake manifold- Fig. 3 is a section on the line AA of Fig. 2; 80 Fig. 4 shows a modification of my mixing chamber as applied to an internal combustion engine; and

Fig. 5 is a section on the line 3-13 of Fig. 2. as eferring in detail to the drawings, my invention comprises a mixing chamber and a centrifugal fan E centrally mounted therein. Mixing chamber A comprises two concentric compartments B and C, which are separated from each other by an u standing web or flange 1. A removab e plate 2 forms a closure for said casing. This plate is adapted to be removable to allow for the insertion of the fan E and on is provided with a flange portion 3 which cooperates with the flange 4 of the casing A and with the bolt 5 and gasket 6 to form an air tight union with said casing. Closur'e plate 2 is provided with a centrally :00 disposed flanged opening as at 7 for the reception of an intake pipe 8 leading from the usual carburetor outlet pi e 9. The closure plate may be attache by screw threads or any other known means to the manifold pipe. The compartments B and C of the main casing communicate with each other through openings 10 which are provided by short sections of pipe 11 which shall be hereinafter termed out at members and which are fixed in the web or flange 1 in such a manner that the walls of said pipe extend well into the interior of the casing B and at least slightly into the interior of the casing C. The purpose of such an arrangement of the pipes 11 will be hereinafter described. The back plate 12 of the casing A is provided with a centrally located flange portion 13 having a bore 14 at the center of the casin for the reception of a shaft 15 on which 51c fan E is mounted. A key 16 and a bolt 17 are provided to hold the fan E rigidly on the shaft 15. This flange portion is further provided with a recess 18 for the reception of an idling shaft 19 which forms a part' of the fan propelling means, as will be described in detail hereinafter.

At the lowermost portion of the compartment B there is provided an outlet 20 to permitthe drainage of liquid particles into the compartment C and through the opening 21 at the lowest part of the compartment C through the ipe 22 and into a point of the intake manifold 8 adjacent to the carburetor outlet. Drainage pi e 22 is secured to the intake manifold an to the mixin chamber b the usual taps and nipples. he casing 1 is rovided at its uppermost ortion with a anged outlet opening 23 which is adapted to be fastened to a correspondingly flanged ortion of an intake manifold pipe 25. fie fan in this mixin chamber may be designed to be prope led in any given manner but in this preferred embodlment it is shown as being operable by a fluid actuated turbine, and as particularly shown in this modification is to be operated by the oil in the oil circulating system of the engine.

A casing 26 is provided for the fan ropelling means. This casin is adapte as shown, to be bolted or ot erwise secured to the flanged portion 13 of the casing A. This casing provides two bearings 27 and 28 for the reception of the working shaft 15 and the idling shaft 19, respectively. A gear 30 is keyed to the shaft 15 by means of a key 29. A second gear 31, so adapted that its teeth will mesh with those of the gear 29. is mounted on the shaft- 19 and keyed theretoby a key 32. A baflie plate 33 is provided which extends substantially the full width of the casing 26 leaving only a small channel 34 at each side thereof. A pipe 35 is shown as the inlet from the oil circulating system to the casing 26 while the pipe 36 shows the outlet from said casin to the oil circulating system.

The 0 ration of thls fan propelling means wi 1 then be seen to be as follows:

The oil enterin through the pi e 35, under pressure, wil strike the baflle p ate 33 and passing to the side of the casing through the narrow channel 34 will impel the upper gear, as viewed in Fig. 5, in a counter-clockwise direction and the lower gear in a clockwise direction. The gear 31 by meshing with the gear 30 assists in rotating the fan E. It is proposed that a means shall be provided for governing the pressure at which the oil is admitted to the casing 26 so that the speed of rotation of the gears, and consequently the fan, may be thereby regulated.

From the foregoing the operation of my device will be seen to be as follows:

The explosive mixture leaves the carburetor outlet 9 and passin through the intake manifold 8 will be a mitted centrally of the casing A through the opening in the front closure plate 2. There it will immediately be received by the fan which will whirl the gas particles violently centrifugally against the web 1 and out through the openings 10 into the outer annular compartment C. It will be noted that the openings 10 are equidistantly disposed around the casing B and are so arranged that none ofthe gases shal be thrown by the direction of the fan directly through the outlet passage defined at 23. Any particles of raw liquid fuel which may be carried along the intake manifold bv the swee of the explosive gases will be thrown vlolently against the web 1 and to a certain extent broken up into finer particles or volatilized. Any unvolatilized particles of liquid fuel, however, will be drawn along the sides of this compartment B and through the outlet 20 and the drain pipe 22 back into the lower portion of the intake manifold 8 whereby they will again strike the incoming gases and have an opportunity to be revolatilized.

The pipes 11, providing for the communication between the two chambers B and C, will, by reason of the fact that their walls extend well into the casing B, prevent any of these liquid particles from being drawn outwardly into the annular casing C. It will thus be seen that I have provided a mixing chamber which will insure a complete mixing of the fuel components and which will provide for the drying of the mixture by excluding therefrom any particles of raw liquid fuel.

If it is desired. as in the case of internal combustion engines operating at changing altitudes, to vary the pressure at which the fuel mixture is to be delivered to the engine, this can be accomplished by increasing the rate of revolution of the fan. T his. as previously stated, can be controlled by any suitable governing means.

It will be noted that the casing which I have described will provide for the damping out of the pulsations.

It will be noted that by means of my device the intake manifold vacuum may be increased at will with the consequent regulation of fuel supplied from the carburetor.

A very important feature of my invention is the ease and simplicity of installation of my device. The fan casing is adapted to be readily installed between the carburetor and the usual intake manifold outlet. The motor for actuating this fan is of exceedingly si'm 1e construction and easily assem bled on t e casing. The fact that the fan motor is fluid operated prevents the complications incident to supplying a system of gears or other mechanical transmission.

With the modification shown in Fig. 4, I have dispensed with the outer compartment 0 and proposed to lead the mixture from the compartment B directly to the cylinders. As shown in this modification, there is rovidcd a separate intakemanifold for eac cylinder, all of which are of equal length and extend into compartment B at equally disposed points. The ends of these individual intake manifold pipes are to extend well into the casing in exactly the same manner as the communicating pipes 11 shown in Fig. 3.

I claim:

1. In a fuel mixing device for use in internal combustion engines, a ,casing adapted to be mounted between the carburetor and the engine intake manifold, said casing comprising a mixing chamber havin a centrally dis sed inlet and a plurality o circumferentially disposed outlet members, and a positively operated centrifugal fan mounted in said mixm chamber.

2. In a fue mixing device for use in internal combustion engines, a casing adapted to be mounted between the carburetor and the engine intake manifold, said casing comrising a mixing chamber having a centrally isposed inlet and a plurality of circumferentlall disposed out at members, the walls of sai outlet members extending to a point inwardly of the chamber walls for the purpose described, and a positively operated centrifu al fan centrally mounted in said mixin c amber.

3. Iii a fuel mixing device for use in internal combustion engines, a casingadapted to be mounted between the carburetor and the engine intake manifold, said casing comprising a mixing chamber havin a centrally disposed inlet and a lurality o circumferential] disposed outFet members, the walls of sai outlet members extendin to a point inwardly of the chamber walls for the purpose described, an annular outlet casing mounted concentrically of the mixing chamber and adapted to receive the fuel mixture from said mixing chamber through said outlet members, and a positively operated centrifu a1 fan centrally mounted in said mixing 0 amber.

4. In a fuel mixing device for use in internal combustion engines, a casing adapted to be mounted between the carburetor and the engine intake manifold, said casing c0mprising a mixing chamber havin a centrally disposed inlet and a lurality o circumferential] disposed out et members, the walls of said outlet members extendin to a point inwardly of the chamber walls for the purpose described, an annular outlet casin integral with and mounted concentrical y of.

the mixing chamber and adapted to receive the fuel mixture from said mixing chamber through said outlet members, and a positively operated centrifugal fan centrally mounted in said mixing chamber.

5. Ina fuel mixing device for use in internal combustion engines, a casing adapted to be mounted between the carburetor and the engine intake manifold, said casing comprising a mixing chamber havin a centrally disposed inlet and a lurality o circumferentiall disposed outliat members, the walls of sai outlet members extendin to a point inwardly of the chamber walls or the purpose described, an annular outlet casing mounted concentrically of the mixing chamber and adapted to receive the fuel mixture from said mixing chamber through said outlet members, a ositively operated centrifugal fan centra y mounted in said mixing chamber, and an outlet from said annular outlet casing so disposed as to be out of the direct line of flow of the gases passing throu h the outlet members.

6. a fuel mixing device for use in mtemal combustion engines a casing adapted to be mounted between the carburetor and the engine intake manifold, said casing comrising a mixing chambenhaving a centrally disposed inlet and a plurality o circumferentiall disposed out et members, the walls of sai outlet members extendin to a point inwardly of the chamber walls or the purpose described, an annular outlet casin integral with and mounted concentrical y of the mixing chamber. and adapted to receive the fuel mixture from said mixing chamber through said outlet members, a positivel operated centrifugal fan centrally mounted in saidmixing chamber, and an outlet from said annular outlet casing so disposed as to be out of the direct line of flow of the gases passing through the outlet members.

In testimony whereof I have afixed my signature.

GEORGE E. A. HALLETT. 

